2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1765
* Engine Coolant Temperature Sensor Replacement (See: Engine, Cooling and Exhaust/Cooling System/Engine - Coolant Temperature
Sensor/Switch/Coolant Temperature Sensor/Switch (For Computer)/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM replacement, setup, and programming
P0117
DTC P0117 or P0118 (Without L96)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0117
- Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage
DTC P0118
- Engine Coolant Temperature (ECT) Sensor Circuit High Voltage
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The engine coolant temperature (ECT) sensor is a variable resistor that measures the temperature of the engine coolant. The engine control module
(ECM) supplies 5 V to the ECT signal circuit and supplies a ground to the low reference circuit.
Conditions for Running the DTC
P0117
* The engine is running for greater than 10 s.
OR
* The ignition is ON when the intake air temperature (IAT) is less than 50掳C (122掳F).
* This DTC runs continuously when the above conditions are met.
P0118
* The engine is running for greater than 10 s.
OR
* The ignition is ON when the IAT is greater than 0掳C (32掳F).
* This DTC runs continuously when the above conditions are met.
Conditions for Setting the DTC
P0117
The ECM detects that the ECT is warmer than 150掳C (302掳F) for greater than 5 s.
